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Questions continue to swirl around the incident in San Antonio that left 10 people dead and more than two dozen others critically injured. The victims were discovered in the back of a tractor-trailer in a Walmart parking lot. As investigators search for answers, a spotlight is falling on the company that owns the trailer involved in this tragic episode.

Iowa City, Iowa-based Pyle Transportation owned the rig where the migrants were found. The small company operates some 20 trucks, often hauling pork from Iowa to Texas. When arrested, the driver of the San Antonio tractor-trailer said he was driving the trailer to Brownsville to be sold.